"use client"

import { useEffect, useMemo, useRef } from "react"
import { useRouter } from "next/navigation"
import { Upload, FolderPlus } from "lucide-react"
import { toast } from "sonner"
import { FileBrowser } from "@/components/drive/file-browser"
import { DriveFilterBar } from "@/components/drive/drive-filter-bar"
import { DriveViewModeToggle } from "@/components/drive/drive-view-mode-toggle"
import { DriveSortMenu } from "@/components/drive/drive-sort-menu"
import { DriveBulkToolbar } from "@/components/drive/drive-bulk-toolbar"
import { DriveMarqueeSurface } from "@/components/drive/drive-marquee-surface"
import { DriveScrollEndSpacer } from "@/components/drive/drive-scroll-end-spacer"
import { Button } from "@/components/ui/button"
import { usePublicShareMenuMutations, usePublicShareMutations } from "@/lib/api/hooks/use-public-share-mutations"
import type { DriveFileInfo } from "@/lib/api/types"
import { useDriveSettingsStore } from "@/lib/stores/drive-settings-store"
import { useDriveFilteredItems } from "@/lib/hooks/use-drive-filtered-items"
import { useDriveFiltersStore } from "@/lib/stores/drive-filters-store"
import {
  sharePermCanCreate,
  sharePermCanDelete,
  sharePermCanEdit,
  sharePermCanUpdate,
} from "@/lib/drive/drive-share-permissions"
import { openPublicShareItem, downloadPublicShareFile } from "@/lib/drive/open-public-share-item"
import { useDriveUIStore } from "@/lib/stores/drive-ui-store"
import {
  DRIVE_BROWSER_CARD_CLASS,
  DRIVE_CARD_PAD_X,
  DRIVE_CARD_SCROLL_PT,
  DRIVE_FILTER_CONTENT_GAP,
} from "@/lib/drive/drive-chrome-classes"
import { cn } from "@/lib/utils"
import { nextUntitledName } from "@/lib/drive/drive-default-name"

export function PublicShareFolderView({
  token,
  folderPath,
  files,
  permissions,
  password,
  folderTitle,
}: {
  token: string
  folderPath: string
  files: DriveFileInfo[]
  permissions: number
  password?: string
  folderTitle: string
}) {
  const router = useRouter()
  const openPreview = useDriveUIStore((s) => s.openPreview)
  const selectedPaths = useDriveUIStore((s) => s.selectedPaths)
  const clearSelection = useDriveUIStore((s) => s.clearSelection)
  const sortField = useDriveSettingsStore((s) => s.sortField)
  const sortDir = useDriveSettingsStore((s) => s.sortDir)
  const folderPlacement = useDriveSettingsStore((s) => s.folderPlacement)
  const filters = useDriveFiltersStore()
  const uploadInputRef = useRef<HTMLInputElement>(null)

  const canEdit = sharePermCanEdit(permissions)
  const canCreate = sharePermCanCreate(permissions)
  const canUpdate = sharePermCanUpdate(permissions)
  const canDelete = sharePermCanDelete(permissions)
  const writable = canUpdate || canDelete

  const mutations = usePublicShareMenuMutations(token, password)
  const { uploadFile, createFolder } = usePublicShareMutations(token, password)

  const filtersSnapshot = useMemo(
    () => ({
      types: filters.types,
      sources: filters.sources,
      contactEmail: filters.contactEmail,
      contactName: filters.contactName,
      datePreset: filters.datePreset,
      dateFrom: filters.dateFrom,
      dateTo: filters.dateTo,
    }),
    [
      filters.types,
      filters.sources,
      filters.contactEmail,
      filters.contactName,
      filters.datePreset,
      filters.dateFrom,
      filters.dateTo,
    ]
  )

  const { filteredItems: filteredFiles } = useDriveFilteredItems(
    files,
    filtersSnapshot,
    { sortField, sortDir, folderPlacement },
    { scopePath: folderPath }
  )

  const selectedTargets = useMemo(
    () => filteredFiles.filter((f) => selectedPaths.has(f.path)),
    [filteredFiles, selectedPaths]
  )
  const showBulk = selectedTargets.length > 0

  useEffect(() => {
    clearSelection()
  }, [folderPath, clearSelection])

  const openItem = (file: DriveFileInfo) => {
    openPublicShareItem(file, {
      token,
      password,
      canEdit: sharePermCanEdit(permissions),
      router,
      openPreview,
      contextItems: filteredFiles,
    })
  }

  const handleUpload = async (fileList: FileList | null) => {
    if (!fileList?.length || !canCreate) return
    const base = folderPath === "/" ? "" : folderPath
    try {
      for (const file of Array.from(fileList)) {
        await uploadFile(`${base}/${file.name}`.replace(/\/+/g, "/"), file)
      }
      toast.success("Fichier(s) importé(s)")
    } catch {
      toast.error("Impossible d’importer le fichier")
    }
  }

  const handleNewFolder = async () => {
    if (!canCreate) return
    const name = nextUntitledName(
      filteredFiles.filter((f) => f.type === "directory").map((f) => f.name),
      "Dossier"
    )
    const base = folderPath === "/" ? "" : folderPath
    const path = `${base}/${name}`.replace(/\/+/g, "/")
    try {
      await createFolder.mutateAsync(path)
      toast.success("Dossier créé")
    } catch {
      toast.error("Impossible de créer le dossier")
    }
  }

  const downloadBulk = async (targets: DriveFileInfo[]) => {
    for (const file of targets) {
      await downloadPublicShareFile(token, file, password)
    }
  }

  return (
    <div className={DRIVE_BROWSER_CARD_CLASS}>
      <div className={cn("shrink-0", DRIVE_FILTER_CONTENT_GAP)}>
        <div
          className={cn(
            "flex min-h-12 shrink-0 flex-wrap items-center justify-between gap-3 py-2",
            DRIVE_CARD_PAD_X
          )}
        >
          <p className="truncate text-sm text-muted-foreground">
            <span className="font-medium text-[#3c4043] dark:text-[#e8eaed]">{folderTitle}</span>
            {" · "}
            {filteredFiles.length} élément{filteredFiles.length > 1 ? "s" : ""}
            {canEdit ? " · Éditeur" : " · Lecture seule"}
          </p>
          <div className="flex flex-wrap items-center gap-2">
            {canCreate ? (
              <>
                <input
                  ref={uploadInputRef}
                  type="file"
                  multiple
                  className="hidden"
                  onChange={(e) => void handleUpload(e.target.files)}
                />
                <Button
                  type="button"
                  variant="outline"
                  size="sm"
                  className="gap-2"
                  onClick={() => uploadInputRef.current?.click()}
                >
                  <Upload className="h-4 w-4" />
                  Importer
                </Button>
                <Button
                  type="button"
                  variant="outline"
                  size="sm"
                  className="gap-2"
                  onClick={() => void handleNewFolder()}
                >
                  <FolderPlus className="h-4 w-4" />
                  Dossier
                </Button>
              </>
            ) : null}
            <DriveSortMenu />
            <DriveViewModeToggle />
          </div>
        </div>
        {showBulk ? (
          <DriveBulkToolbar
            targets={selectedTargets}
            allowShare={false}
            allowMove={false}
            allowCopy={false}
            allowQuickLink={false}
            allowDelete={canDelete}
            mutations={mutations}
            onDownloadBulk={downloadBulk}
          />
        ) : (
          <DriveFilterBar showContacts={false} />
        )}
      </div>

      <main
        data-drive-browser-main
        className="flex min-h-0 flex-1 flex-col overflow-auto"
      >
        <DriveMarqueeSurface
          enabled={filteredFiles.length > 0}
          className="min-h-full"
        >
          {files.length === 0 ? (
            <p
              className={cn(
                DRIVE_CARD_PAD_X,
                DRIVE_CARD_SCROLL_PT,
                "py-8 text-center text-sm text-muted-foreground"
              )}
            >
              Ce dossier est vide.
              {canCreate ? " Importez un fichier ou créez un dossier." : ""}
            </p>
          ) : filteredFiles.length === 0 ? (
            <p
              className={cn(
                DRIVE_CARD_PAD_X,
                DRIVE_CARD_SCROLL_PT,
                "py-8 text-center text-sm text-muted-foreground"
              )}
            >
              Aucun élément ne correspond aux filtres.
            </p>
          ) : (
            <FileBrowser
              items={filteredFiles}
              view="shared"
              allowShare={false}
              writable={writable}
              hideFavorite
              disableDnd
              mutations={mutations}
              publicShare={{ token, password }}
              onOpenItem={openItem}
              onDownloadItem={(file) =>
                void downloadPublicShareFile(token, file, password).catch(() =>
                  toast.error("Téléchargement impossible")
                )
              }
            />
          )}
          <DriveScrollEndSpacer />
        </DriveMarqueeSurface>
      </main>
    </div>
  )
}